[单项选择]The specialized or technical language of a trade, profession, or similar group is called（）.
A. slang
B. idiom
C. jargon
D. proverb

Modern Language College
Modern Language College was opened in 1983 and is now the largest private languages school in the country. It is the most active private language school and runs a wide variety of courses.
The college has branches in many provincial capitals. All schools are air-conditioned, and the classrooms are clean and bright. Each room has a whiteboard, desks and chairs and a cassette recorder.
We offer courses for both adults and children. We focus on conversation courses, although we also offer more specialized courses.
We provide our students with all useful materials. There are courses in major software package, popular programming languages, and other areas such as web page design and use of the Internet.
We have a large team of administrative staff supporting our operations. These include: student counselors, who are usually the first point of contact between a student and the school; branch managers, who oversee